First of all, please stop by the intro section and tell us a little about yourself and your high wall. There are losts of guys in here that would love to help ya out.
If you havent done any gunsmithing before------stop now and take your rifle to a gunsmith.
If you have gunsmithing experience..........
I would 2x check the rifle with a schematic (schematic of the action if possible) to make sure that all of your parts are put in the correct way. IF you are 100% sure that the parts are assembled correctly, I would then check the trigger weight adjustment screw. It may be adjusted too heavy. If neither one of these work, i would suggest you take your rifle to a qualified gunsmith. (adjusting or installing the action, sear or trigger incorrectly could be a safety issue)
hope this helps.